docs: def get_top_tracks(self, limit=None, cacheable=True):
          """Returns the most played tracks as a sequence of TopItem objects."""
  
          params = {}
          if limit:
              params["limit"] = limit
  
          doc = _Request(self, "chart.getTopTracks", params).execute(cacheable)
  
          seq = []
          for node in doc.getElementsByTagName("track"):
              title = _extract(node, "name")
              artist = _extract(node, "name", 1)
              track = Track(artist, title, self)
              weight = _number(_extract(node, "playcount"))
              seq.append(TopItem(track, weight))
  
          return seq